compare-nrmse

compare_nrmse

skimage.measure.compare_nrmse(im_true, im_test, norm_type='Euclidean') [source]

Compute the normalized root mean-squared error (NRMSE) between two images.

Parameters:

im_true : ndarray Ground-truth image. im_test : ndarray Test image. norm_type : {‘Euclidean’, ‘min-max’, ‘mean’} Controls the normalization method to use in the denominator of the NRMSE. There is no standard method of normalization across the literature [R259]. The methods available here are as follows: ‘Euclidean’ : normalize by the Euclidean norm of im_true. ‘min-max’ : normalize by the intensity range of im_true. ‘mean’ : normalize by the mean of im_true.

Returns:

nrmse : float The NRMSE metric.

References

[R259]

(1, 2) https://en.wikipedia.org/wiki/Root-mean-square_deviation